Hawking radiation in GHS and non-extremal D1-D5 blackhole via covariant anomalies

TL;DR

This paper derives Hawking radiation from GHS and non-extremal D1-D5 blackholes using covariant gravitational anomalies, extending the anomaly method to more general and stringy blackhole solutions.

Contribution

It applies the covariant anomaly approach to derive Hawking radiation for the most general spherically symmetric and stringy blackholes, broadening the method's applicability.

Findings

Successfully derives Hawking radiation for GHS blackhole

Extends covariant anomaly method to D1-D5 blackhole

Demonstrates the method's versatility for complex blackholes

Abstract

We apply the method of Banerjee and Kulkarni (arXiv:0707.2449, [hep-th]) to provide a derivation of Hawking radiation from the GHS (stringy) blackhole which falls in the class of the most general spherically symmetric blackholes ($\sqrt{-g}\neq 1$) and also the non-extremal $D1-D5$ blackhole using only covariant gravitational anomalies.